The role of phosphate in detergent powder is to

Options

A. Control pH level of the detergent water mixture
B. Remove `Ca^(2+)` and `Mg^(2+)` ions from the water that causes the hardness of water
C. Provide whiteness to the fabrics
D. Form solid detergent as phosphate-less detergent are liquid in nature

Answer

B

Explanation

It forms phosphates of `Ca^(2+)` and `Mg^(2+)` ions that causes the hardness of water. These are insoluble in water so settles down.